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Shahmoradi B, Namratha K, Byrappa K, Soga K, Ananda S, Somashekar R. Enhancement of the photocatalytic activity of modified ZnO nanoparticles with manganese additive. RESEARCH ON CHEMICAL INTERMEDIATES 2011. [DOI: 10.1007/s11164-011-0255-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shahmoradi B, Ibrahim IA, Sakamoto N, Ananda S, Row TNG, Soga K, Byrappa K, Parsons S, Shimizu Y. In situ surface modification of molybdenum-doped organic-inorganic hybrid TiO2 nanoparticles under hydrothermal conditions and treatment of pharmaceutical effluent. ENVIRONMENTAL TECHNOLOGY 2010; 31:1213-20. [PMID: 21046951 DOI: 10.1080/09593331003592261] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Molybdenum-doped TiO2 organic-inorganic hybrid nanoparticles were synthesized under mild hydrothermal conditions by in situ surface modification using n-butylamine. This was carried out at 150 degrees C at autogeneous pressure over 18 h. n-Butylamine was selected as a surfactant since it produced nanoparticles of the desired size and shape. The products were characterized using powder X-ray diffraction, Fourier transform infrared spectrometry, dynamic light-scattering spectroscopy, UV-Vis spectroscopy and transmission electron microscopy. Chemical oxygen demand was estimated in order to determine the photodegradation efficiency of the molybdenum-doped TiO2 hybrid nanoparticles in the treatment of pharmaceutical effluents. It was found that molybdenum-doped TiO2 hybrid nanoparticles showed higher photocatalytic efficiency than untreated TiO2 nanoparticles.
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Shahmoradi B, Soga K, Ananda S, Somashekar R, Byrappa K. Modification of neodymium-doped ZnO hybrid nanoparticles under mild hydrothermal conditions. NANOSCALE 2010; 2:1160-1164. [PMID: 20648343 DOI: 10.1039/c0nr00069h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The morphology and particle size of neodymium-doped ZnO hybrid nanoparticles were tailored through fabrication under mild hydrothermal conditions (T = 150-250 degrees C, P = autogeneous, t = 18 h) for the first time using two surface modifiers: caprylic acid and n-butylamine. Characterization of these nanoparticles was carried out using powder XRD, FTIR, SEM, zeta-potential analysis and UV-vis spectroscopy. The results revealed that modification of ZnO nanoparticles using neodymium as a dopant and caprylic acid or n-butylamine as a surfactant could change the optical and physical properties of the surface-modified neodymium-doped ZnO hybrid nanoparticles. The work proved the efficiency of caprylic acid and n-butylamine as suitable surfactants for surface modification of neodymium-doped ZnO hybrid nanoparticles.
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Ananda S, Nowak AK, Cher L, Dowling AJ, Brown C, Simes RJ, Rosenthal M. Phase II trial of combined temozolomide and pegylated liposomal doxorubicin in the treatment of patients with glioblastoma multiforme following concurrent radiotherapy and chemotherapy. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.2072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Lakshmi GC, Ananda S, Gowda NMM. Synthesis, Characterization and Antioxidant Activity of Zinc(II) and Ruthenium(III) Pyridoxine Complexes. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/15533170903227796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ravi Kumar H, Ananda S, Devaraju KS, Prakash BM, Sampath Kumar S, Suresh Babu SV, Ramachandraswamy N, Puttaraju HP. A sensitive assay for ornithine amino transferase in rat brain mitochondria by ninhydrin method. Indian J Clin Biochem 2009; 24:275-9. [PMID: 23105849 DOI: 10.1007/s12291-009-0052-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To establish/develop an assay method for measuring Ornithine Aminotransferase (EC.2.6.1.13) activity using rat brain mitochondria as a source of enzyme in presence and absence of Pyridoxal Phosphate (PLP). The modified method, with the improved sensitivity, is adopted for the assay of ornithine amino transferase activity in rat brain mitochondria. The enzyme activity was measured at 620 nm, the study showed that reaction was optimum at 37°C for 30 minutes. The assay is sensitive enough to detect activity at the order of nanomoles pyrroline-5-carboxylate/mg protein/minute and can be compared as an alternative to the radio isotopic method which is more cumbersome and aminobenzaldehyde method which is less sensitive. The K(m) & V(max) shows maximum activity in the presence of Pyridoxal Phosphate (Coenzyme) concentration at 0.05mM when compared with absence of Pyridoxal Phosphate as higher the concentration of Pyridoxal Phosphate affects the affinity of the enzyme to substrate. The OAT activity in different tissues of the rat was also studied and highest activity was found in liver and kidney.
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Kosmider S, Stella DL, Field K, Moore M, Ananda S, Oakman C, Singh M, Gibbs P. Preoperative investigations for metastatic staging of colon and rectal cancer across multiple centres--what is current practice? Colorectal Dis 2009; 11:592-600. [PMID: 18624816 DOI: 10.1111/j.1463-1318.2008.01614.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The optimal strategy for elective distant staging of colorectal carcinoma (CRC) has yet to be defined, with current guidelines based on small and limited series. One specific issue requiring review is the value of routine computerized tomographic (CT) chest examination. Also lacking is data on current routine clinical practice. METHOD A retrospective chart review of consecutive cases of elective surgery for CRC from five hospitals. RESULTS Two hundred and fifty-seven cases were reviewed, 128 colon and 129 rectal primaries. 164 (64%) of patients overall, ranging from 45% to 88% across the individual centres, had a preoperative serum CEA level performed. CT abdomen/pelvis was performed in 222 (86%) of cases, ranging from 69% to 98% per centre. CT chest was performed in 95 (37%) of cases, 47% of rectal vs 29% of colon cancers (P = 0.004). In 17 cases (18%) CT chest examinations revealed abnormalities suspicious for metastatic disease, leading to a change in management in six (35%) of these cases. Of the 17 cases with an abnormal CT chest, in only 5 of the 14 (36%) where carcinoembryonic antigen (CEA) levels were also recorded was this increased, and in only three (21%) was this markedly (> 10 microg/l) elevated. CONCLUSIONS Substantial variability exists in the preoperative evaluation of patients with CRC. Many patients do not have a CEA and/or abdominal imaging performed. Where performed, CT chest revealed suspicious findings in a significant number of patients, the vast majority of whom had a normal or near normal CEA. Future studies are required to define optimal preoperative staging.
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Ananda S, Kosmider S, Lim L, Barnett F, Desai J, Gibbs P. Adjuvant chemotherapy for stage II and stage III colon cancer—What is happening in routine practice? J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e15046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15046 Background: Randomised studies have defined adjuvant chemotherapy as standard treatment for stage III colon cancer (SIIICC), with multiple options available. For stage II (SII) disease, the selection of patients for adjuvant treatment remains controversial. There remains limited data on clinician decision making regarding adjuvant chemotherapy in routine clinical practice. Methods: A review of patients treated with SII & IIICC at 4 hospitals, utilising data from BioGrid Australia, where clinician choice and rationale were prospectively documented. Results: 372 patients (37%) with SII and 307 (30%) with SIIICC were identified from 1015 CC patients treated from January 2003 till November 2008. Median age was 68 years, 51% were male; 49% female. 66 (25%) of patients with SIIICC were not offered chemotherapy, predominantly due to advanced age or co-morbidity. Since oxaliplatin and capecitabine became widely available in 2005, 66% of treated patients have received oxaliplatin based therapy, 15% bolus 5-FU alone and 19% capecitabine. For SII disease, overall 81 (26%) pts received adjuvant chemotherapy. Age was the dominant influence on treatment choice with 41% aged 70 (p<0.001) receiving treatment. Patients with high risk features were also more likely to receive adjuvant therapy. (p= 0.006 for those with lymphovascular invasion and p= 0.0068 for those with T4 tumours). Dose reductions and completion rates were similar for SII and III disease, and for older and younger patients. Conclusions: Over 25% of patients with SIIICC do not receive adjuvant chemotherapy in routine practice, with physicians basing non-treatment recommendations predominantly on patient age and co-morbidity. Where treatment is used, oxaliplatin-based therapy is the dominant regimen, except in older patients. In SIICC, adjuvant chemotherapy is used in one in four patients, more frequently in younger patients and those with high risk features. No significant financial relationships to disclose.
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Ananda S, Nicholls DP, Mogul DJ. Modulation of instantaneous synchrony during seizures by deep brain stimulation. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2009; 2009:3310-3313. [PMID: 19964300 DOI: 10.1109/iembs.2009.5333714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Epileptic seizures were experimentally induced in the CA3 region of rat hippocampus in vivo. Recordings of seizure activity were made in both hippocampi as well as anteromedial region of the thalamus in order to analyze the instantaneous activity for synchronous oscillators. A new method is introduced for detecting this synchrony which combines empirical mode decomposition, the Hilbert analytic signal method and eigenvalue decomposition. Effects of targeted deep brain stimulation on multi-site synchrony were assessed as a means to extinguish hypersynchrony during epileptic seizures.
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Byrappa K, Sajan C, Ananda S, Rai L, Vijay Kumar M, Soga K. Hydrothermal synthesis of doped ZnO and its application in photodegradation of toxic amaranth dye. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Byrappa K, Suresh Kumar BV, Ranganathaiah C, Somashekar R, Dinesh R, Lokanatha Rai KM, Ananda S. Hydrothermal crystallization and characterization of R +3: AlPO 4zeolites, where R = Ce, Pr and Nd. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305083819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Subramani AK, Byrappa K, Dinesh R, Rai KML, Ananda S, Yoshimura M. Hydrothermal preparation of TiO 2: AC composite crystalline particulates. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305095024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Saldanha R, Ananda S, Venkatesha B, Made Gowda N. Oxidation of psychotropic drugs by Chloramine-T in acid medium: a kinetic study using spectrophotometry. J Mol Struct 2002. [DOI: 10.1016/s0022-2860(01)00859-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ananda S, Jagadeesha MB, Puttaswamy, Venkatesha BM, Vinod TK, Made Gowda NM. Kinetic and mechanistic studies of some aliphatic amines' oxidation by sodium N-bromo-p-toluenesulfonamide in hydrochloric acid medium. INT J CHEM KINET 2000. [DOI: 10.1002/1097-4601(2000)32:12<776::aid-kin5>3.0.co;2-j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Forer M, Ananda S. The management of postnasal drip. AUSTRALIAN FAMILY PHYSICIAN 1999; 28:223-8. [PMID: 10098301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
BACKGROUND Postnasal drip is a symptom that can be very irritating to both patient and doctor. OBJECTIVE The aim of this article is to give an approach to diagnosis and treatment of postnasal drip. DISCUSSION In order to have an approach to management of this problem the pathophysiology needs to be understood. The causes of increased mucus awareness need to be known. Investigations are aimed at trying to clearly define the cause of the increased mucus and then specific treatment can be given to remedy the situation. Treatment is generally medical, however, surgical treatment is required in certain situations.
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Ananda S, Saldanha RJD, Rai KML, Venkatesha BM. Kinetic and mechanistic study of oxidation of diethylamine by N-sodio-N-bromobenzene sulphonamide (Bromamine-B) in acid solution: Catalyzed by Ru(III). INT J CHEM KINET 1999. [DOI: 10.1002/(sici)1097-4601(1999)31:10<744::aid-jck8>3.0.co;2-n] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ananda S, Jagadeesha M, Gowda N. Ruthenium(III) catalyzed oxidation of primary amines by bromamine-T in HCL medium: A kinetic and mechanistic study. J Inorg Biochem 1997. [DOI: 10.1016/s0162-0134(97)80283-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Gowda NM, Vallabhaneni RK, Gajula I, Ananda S. Palladium(II)-phenothiazine complexes: synthesis and characterization. J Mol Struct 1997. [DOI: 10.1016/s0022-2860(96)09750-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Ananda S, Jagadeesha MB, Venkatesha BM, Gowda NMM. Kinetics of oxidation of indigo carmine by N-sodio-N-bromotoluenesulfonamide in acidic buffer medium. INT J CHEM KINET 1997. [DOI: 10.1002/(sici)1097-4601(1997)29:6<453::aid-kin7>3.0.co;2-t] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ananda S, Demappa T, Gowda NMM. Oxidation of primary amines by bromamine-B catalyzed by Osmium(VIII) in alkaline medium: A kinetic and mechanistic study. INT J CHEM KINET 1997. [DOI: 10.1002/(sici)1097-4601(1997)29:10<737::aid-kin2>3.0.co;2-n] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ananda S, Demappa T, Mahadevappa DS, Made Gowda NM. Oxidation of some primary amines by bromamine-B in alkaline medium: A kinetic and mechanistic study. INT J CHEM KINET 1996. [DOI: 10.1002/(sici)1097-4601(1996)28:12<873::aid-kin2>3.0.co;2-k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Venkatesha BM, Ananda S, Mahadevappa DS, Gowda NMM. Kinetic and mechanistic studies of indigocarmine oxidation by chloramine-T and chlorine in acidic buffer media. INT J CHEM KINET 1995. [DOI: 10.1002/kin.550270706] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ananda S, Venkatesha BM, Mahadevappa DS, Gowda NMM. Ruthenium(III) catalyzed kinetics of chloroacetic acids oxidation by sodiumN-bromobenzenesulfonamide in hydrochloric acid medium. INT J CHEM KINET 1993. [DOI: 10.1002/kin.550250906] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Venkatesha BM, Ananda S, Mahadevappa DS. Oxidation of indole byN-sodio-N-chlorobenzenesulphonamide (chloramine-B) in alkaline medium catalysed by os(viii): A kinetic and mechanistic study. J PHYS ORG CHEM 1992. [DOI: 10.1002/poc.610050702] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Mahadevappa D, Mohan K, Ananda S. Oxidation of aliphatic ketones by bromamine-b: a kinetic study. Tetrahedron 1986. [DOI: 10.1016/s0040-4020(01)82067-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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